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Cheap flights from San Juan to London from £208

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Juan to London departing on 26/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
14:26 - 11:20
SJU
-
LHR
15h 54m
1 stop
Virgin Atlantic Logo
19:50 - 12:13
LHR
-
SJU
21h 23m
1 stop
£557Virgin Atlantic
Fri, 18 Sep - Fri, 2 Oct
Virgin Atlantic Logo
13:25 - 06:45
SJU
-
LHR
12h 20m
1 stop
Virgin Atlantic Logo
12:50 - 23:59
LHR
-
SJU
16h 09m
1 stop
£563Virgin Atlantic
Wed, 22 Apr - Wed, 29 Apr
Multiple Airlines Logo
20:27 - 10:00
SJU
-
LGW
32h 33m
1 stop
Multiple Airlines Logo
14:00 - 23:24
LGW
-
SJU
14h 24m
1 stop
£575Multiple Airlines
Sat, 25 Apr - Fri, 8 May
Iberia Logo
13:35 - 09:25
SJU
-
LHR
14h 50m
1 stop
Iberia Logo
10:50 - 18:50
LHR
-
SJU
13h 00m
1 stop
£586Iberia
Fri, 14 Aug - Fri, 28 Aug
Virgin Atlantic Logo
07:15 - 06:20
SJU
-
LHR
18h 05m
1 stop
Virgin Atlantic Logo
12:50 - 23:59
LHR
-
SJU
16h 09m
1 stop
£592Virgin Atlantic
Wed, 22 Apr - Wed, 29 Apr
United Airlines Logo
13:25 - 07:15
SJU
-
LHR
12h 50m
1 stop
United Airlines Logo
14:10 - 14:44
LHR
-
SJU
29h 34m
1 stop
£598United Airlines
Tue, 18 Aug - Thu, 27 Aug
United Airlines Logo
13:25 - 07:15
SJU
-
LHR
12h 50m
1 stop
United Airlines Logo
09:30 - 23:50
LHR
-
SJU
19h 20m
2 stops
£601United Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
03:21 - 06:20
SJU
-
LGW
21h 59m
2 stops
Multiple Airlines Logo
14:00 - 23:24
LGW
-
SJU
14h 24m
1 stop
£604Multiple Airlines
Thu, 16 Apr - Mon, 27 Apr
Delta Logo
07:30 - 06:25
SJU
-
LHR
17h 55m
1 stop
Delta Logo
11:45 - 23:59
LHR
-
SJU
17h 14m
2 stops
£622Delta
Sun, 19 Apr - Wed, 29 Apr
Iberia Logo
16:38 - 15:15
SJU
-
LCY
17h 37m
2 stops
Iberia Logo
09:35 - 18:50
LCY
-
SJU
14h 15m
1 stop
£649Iberia
Mon, 27 Jul - Fri, 14 Aug

American Airlines flights from San Juan to London

Our best American Airlines deals on San Juan to London flight tickets
American Airlines
14 Aug
SJU15:50San Juan Luis Munoz Marin Intl
16h 00m
1 stop
LHR12:50London Heathrow
28 Aug
LHR07:50London Heathrow
16h 00m
1 stop
SJU18:50San Juan Luis Munoz Marin Intl
£631
American Airlines
1 Aug
SJU15:40San Juan Luis Munoz Marin Intl
16h 10m
1 stop
LHR12:50London Heathrow
12 Aug
LHR06:15London Heathrow
17h 35m
1 stop
SJU18:50San Juan Luis Munoz Marin Intl
£668
American Airlines
12 Aug
SJU15:50San Juan Luis Munoz Marin Intl
16h 00m
1 stop
LHR12:50London Heathrow
17 Aug
LHR12:00London Heathrow
15h 56m
1 stop
SJU22:56San Juan Luis Munoz Marin Intl
£685

KLM flights from San Juan to London

Our best KLM deals on San Juan to London flight tickets
KLM
22 Apr
SJU13:25San Juan Luis Munoz Marin Intl
15h 55m
1 stop
LHR10:20London Heathrow
29 Apr
LHR09:20London Heathrow
18h 53m
1 stop
SJU23:13San Juan Luis Munoz Marin Intl
£637
KLM
11 Sept
SJU17:41San Juan Luis Munoz Marin Intl
14h 34m
1 stop
LHR13:15London Heathrow
20 Sept
LHR09:20London Heathrow
17h 40m
1 stop
SJU22:00San Juan Luis Munoz Marin Intl
£673
KLM
19 Apr
SJU17:34San Juan Luis Munoz Marin Intl
14h 41m
1 stop
LHR13:15London Heathrow
26 Apr
LHR12:50London Heathrow
16h 09m
1 stop
SJU23:59San Juan Luis Munoz Marin Intl
£681

momondo Fare Finder

 
Customise your flight search to find flights from San Juan to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 24 March 2026.
Use the filters below to find and compare flights from San Juan to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 18/9

14:26-11:20

1 stop15h 54m

London Heathrow

Fri 2/10

19:50-12:13

1 stop21h 23m

£557

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

13:25-06:45

1 stop12h 20m

London Heathrow

Wed 29/4

12:50-23:59

1 stop16h 09m

£563

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Sat 25/4

20:27-10:00

1 stop32h 33m

London Gatwick

Fri 8/5

14:00-23:24

1 stop14h 24m

£575
Fastest return journey

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 14/8

13:35-09:25

1 stop14h 50m

London Heathrow

Fri 28/8

10:50-18:50

1 stop13h 00m

£586

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

07:15-06:20

1 stop18h 05m

London Heathrow

Wed 29/4

12:50-23:59

1 stop16h 09m

£592

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 18/8

13:25-07:15

1 stop12h 50m

London Heathrow

Thu 27/8

14:10-14:44

1 stop29h 34m

£598

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 18/8

13:25-07:15

1 stop12h 50m

London Heathrow

Tue 25/8

09:30-23:50

2 stops19h 20m

£601

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Thu 16/4

03:21-06:20

2 stops21h 59m

London Gatwick

Mon 27/4

14:00-23:24

1 stop14h 24m

£604

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 19/4

07:30-06:25

1 stop17h 55m

London Heathrow

Wed 29/4

11:45-23:59

2 stops17h 14m

£622

San JuanLondon

SJU - LCY

SJULCY

San Juan Luis Munoz Marin Intl

Mon 27/7

16:38-15:15

2 stops17h 37m

London City

Fri 14/8

09:35-18:50

1 stop14h 15m

£649

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from San Juan to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between San Juan and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from San Juan is in February. Flight prices, which tend to average around £437, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from San Juan averaging around £468.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £623 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Juan for as low as £513 on momondo.

Cheap San Juan to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to London

Fastest flight time

11h 45m

Direct flights

None
The fastest flight from San Juan to London takes 11h 45m
There are no direct flights from San Juan to London. There are no popular flight routes from San Juan to London.
Search flight deals

  • How far is San Juan to London by plane?

    San Juan and London are 4196.4 mi apart from one another. Flights usually cover this in 11h 45m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from San Juan to London?

    Prices for flights from San Juan to London refresh daily.

  • How old do you have to be to fly from San Juan to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.

  • What documentation or ID do you need to fly to London?

    The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Southend-on-Sea
Ipswich
Wembley
Canterbury
Ilford
Guildford
Hayes
Chelmsford
Dover
Folkestone
Ramsgate
Chichester
Bedford
Worthing

Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

It is quick and easy to find San Juan to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Juan to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Juan to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport